Evaporative cooling systems are a reliable way to provide you with cool air when the weather is uncomfortably hot. Such Cooling systems serve as an alternative to air conditioners. It functions by pumping a refrigerating agent through the cycles of compression and evaporation.

The Way Evaporative Coolers Work

There are a number of types of evaporative coolers like direct, indirect and two-stage coolers. However, direct evaporative coolers stand out as the most common type. In such coolers, the warm air outside gets blown through a heat exchanger, typically a dampened pad. The air cools down as a result of the evaporation of moisture. Evaporative coolers have been around for far longer than cooling done through refrigerants. Coolers making use of this scientific principle consume far less energy than air-conditioners and are particularly suitable for hot and dry climates. On the flip side, the water and moisture involved and the fact that it cannot affect air moisture means that it will not work in humid climates.

Direct Evaporative Cooling

This is the simplest variety of available evaporative cooling systems and is also the one that is most popular. You can imitate the underlying science behind direct evaporative cooling by keeping a wet handkerchief around the neck and standing in front of a fan on a hot day. In order to change the state of a liquid, like water to vapor, heat energy is required. The water in the wet handkerchief takes up heat from your body and evaporates which results in you feeling cooler.

Coolers that make use of the direct evaporation method are an effective alternative to an air conditioner in certain types of climates, besides being more affordable and economical.

Two Stage Evaporative Cooling

In two-stage or Indirect Direct Evaporative Cooling Systems, the resultant moisture arising from the cooling process is let out through the help of secondary air flow.

This is the most advanced variant of evaporative. Though it is much more economical and efficient than the refrigerant cooling method employed by traditional air conditioners, it does not work just as well in all instances.

To sum up what is evaporative cooling and why you should invest in it:

The science behind evaporative cooling, as mentioned before, has been around for a far longer time period compared to the more recent innovation of air conditioners. The coolers using this scientific technique are well suited for the hot and dry climate, but its use decreases sharply as the humidity levels of climates rise.